Part 1, 1910] NECTRIACEAE 29 
125 long; spores crowded, ellipsoid, straight or curved, hyaline or slightly yellowish, 
many-septate and muriform, 18-24 « 8-12. 
On branches of Acer, Fraxinus, and Xanthoxylum. 
TYPE LOCALITY: Europe. 
DISTRIBUTION: New York to Ontario and Ohio; Colorado (?); also in Europe. 
EXSICCATI: Ellis & Ev. N. Am. Fungi 2546, 3310, 
2. Thyronectria denigrata (Wint.) Seaver, 
Mycologia 1: 204. 1909. 
Pleonectria denigrata Wint. Bull. Torrey Club 10: 49. 1883. 
Perithecia erumpent in very dense, large, rounded clusters 2-5 mm. in diameter, seated 
on a brownish stroma; individual perithecia nearly globose, minutely roughened, dark- 
brownish, with a prominent, black, shining ostiolum, finally becoming black, 350-450 » in 
diameter; asci cylindric, 50-70 8-10; spores 1-seriate or crowded, short-ellipsoid, 
hyaline or slightly yellowish, 3-5-septate, becoming muriform, often a little constricted, 
10-15 & 7-9 u. 
On branches of Gledtisia triacanthos I,. 
TYPE LOCALITY: Lexington, Kentucky. 
DISTRIBUTION: Delaware to Kansas and Kentucky. 
ExsiccaTi: Ellis, N. Am. Fungi 2274; Ellis & Ev. N. Am. Fungi 2372. 
3. Thyronectria missouriensis (Ellis & Ev.) Seaver, 
Mycologia 1: 205. 1909. 
Neciria missouriensis Ellis & Ev. Jour. Myc. 4: 57. 1888. 
Pleoneciria missouriensis Sacc. Syil. Fung. 9: 990, 1891. 
Paraneciria missouriensis Paz.; Rab.-Wint. Fungi Eur. 3748. 1891. 
Perithecia on the stroma in cespitose clusters of 6-20, dull-red, nearly globose, smooth 
or minutely rough, with a prominent ostiolum, usually not collapsing, 250-300 in diameter; 
asci clavate, 100-120 K 12-15; spores crowded irregularly in the ascus, large, ellipsoid, 
straight or a little curved, hyaline or very slightly yellowish, 6-7-septate, with several 
longitudinal septa, dividing the spore into numerous small cells, 20-30 10-12 pv. 
On bark of Hicoria. . : . 
‘TyPE LOCALITY: Concordia, Missouri. 
DISTRIBUTION : Delaware to Missouri. 
4, Thyronectria berolinensis (Sacc.) Seaver, 
Mycologia 1: 205. 1909. 
?Neciria Ribis Niessl, Verh. Nat. Ver. Briinn 34: 171. 1865. 
Pleonectria berolinensis Sace. Michelia 1: 123. 1878. 
Pleonectria Ribis P, Karst. Medd. Soc. Faun. Fl. Fenn. 5: 42. 1879. 
Perithecia erumpent in large cespitose clusters 1-3 mm. in diameter on a stroma which 
becomes indistinct in aged specimens ; individual perithecia dull brick-red, becoming darker 
with age and often quite black, smooth or nearly so, entirely collapsing, becoming pezizoid 
with age, 250-300 in diameter; asci cylindric-clavate ; spores 1-seriate, ellipsoid, 5—9-sep- 
tate and muriform, hyaline or very slightly yellowish, 16-20 7-84. ° 
On dead branches of Rives (wild and cultivated) ; also reported on Prunus sp. 
‘TPE LOCALITY: Germary. 
DISTRIBUTION: Massachusetts to Montana and Colorado ; oe in Europe. 
ILLUSTRATIONS : ee & Ev. N. Am. Pyrenom. p/. 12, /. 7. 
ExsIccaTI: Ellis, N. Am. Fungi 470; Ellis & Ev. Fungi Cae: 26, 470 ; Wilson & Seaver, 
Ascon. 67. 
5. Thyronectria sphaerospora (Ellis & Ev.) Seaver, 
Mycologia1: 206. 1909. 
Nectria sphaerospora Ellis & Ev.; Webber, Ann. Rep. Neb. Board Agr, 1889: 193. S 1890. 
Chilonectria crinigera Ellis & Ev. Proc. Acad. Phila. 1890: 246. O 1890. 
Perithecia cespitose on a tubercular stroma in small clusters of 3-12 each; individual 
perithecia subglobose, papillate, minutely rough, at first covered with a brownish, furfu- 
raceous coat, finally bare and nearly black, slightly collapsing or entire, about 300-400 # in 
diameter ; asci clavate, about 50-70X12-15 4, at first filled with numerous minute spore-like 
